Switch lock



y 1930. I -r. B. LYLES 7 1,759,655

SWITCH LOCK Filed Sept. 10, 192'? 2 Sheets-Sheet 1 Patented May 20,1930

THOMAS B. LYLES, OF TERRE HAUTE, INDIANA SWITCH LOOK Application filed September 10, 1927. Serial No. 218,721.

The invention relates to improvements in looks in which the combination works in conjunction with a key and electric switch; and the objects of the improvements are to prevent the switch from being turned on without the key, and also the knowledge of the combination. i

The form of the invention is illustrated in the accompanying drawing, in which Figure l is an isometric View of the entire lock, parts thereof in section. Figure 2-A a plain inside view of front plate as it appears after its removal from the lock. Figure 2-13 an end view of the front plate showing angles where the knob and key guide are fitted. Figure 3A a plain front view of the receiver with the front plate and all other removable parts removed. Figure 3-13 is an end view of the receiver and front plate showing the depth of the entire lock.

The receiverl and locking lug gear guide 14 constitute the entire frame of the lock.-

The knob 11 passes through the front plate 12, resting in a countersink as shown in Figure 2-B, and a cam shaft passes through tumblers 101010 resting in a groove at the rear of receiver l.- When the combination has been worked, a key is inserted in the key-hole guide 9,. the notches of the key extending out through the slot in the key gear shaft 8.

The key is turned to the right, turning the key gear 7, the locking lug'6 slides into the grooves of tumblers 10- 10'10,'the switch gear 2 turnsto the left one-quarter of its circumference, connecting the switch 4-4 with the wire connection-5 5, which passes out through the rear. as shown in Figure 40 3B to the batteries and gas engine.

Figure 2 A is an inside View of the front plate 12, showing how it is cut to hold knob 11, key hole guide 9 andswitch-gear shaft 3 in place. t Figure 2B is an end view 'ofthe front plate showing angles for knob 11, key-hole guide 9 and depth of groove for the switchgear shaft 3 and the locking lug guide 13.

Figure 3A is a plain front view of re- 59 ceiver 1, with all removable parts removed,

the wire connection 55 passing through the rear of thereceiver l. The receiver 1, and

I claim 1. In a switch look, a casing, an electrical switch mechanism including a gear mounted within the casing, a locking lug slidably mounted in the casing and provided with means coacting with theswitch gear to rotate the latter upon movement of the locking lug,means operable by a key for actuating said locking lug and permutation locking tumblers positioned in the path of travel of the locking lug and permitting movement of the latter when spaces in all of the tumblers are in endwise alignment with the locking lug.

2. In a device of the kind disclosed, a casing, a lock key barrel mounted in the casing to be rotated by a key,'a gear on said barrel, a locking lug' slidably mounted in the casing, a double gear rack carried by said lug and having a portion meshing with the key barrel gear whereby said locking lugv may be actuated upon rotation of the key barrel, an electric switch mechanism mounted within the casing and including a gear meshing with other portion of the double rack and a permutation lock including tumblers located in the path of travel of the locking lug having notches, which when in alignment with each other and with the locking lug permit actuation of the latter upon operation of the key to thereby transmit motion to the switch mechanism through the switch gear.

v THOMAS B. LYLES. 

